Help requested for Signal Debugging #57
Description
I am opening a new topic here, since my first question on the color code of the wires has been answered and now this is more about looking at the signals. As explained in the previous topic, after following Jens' hardware setup from the main page, I am receiving "random" on/off status messages via MQTT but they dont make sense. I have activated serial debug, but I cant make any sense of it.
Now I have bought a logic analyzer and first checked the tapped signals from the pool without having connected the board or D1. I have set the sampling frequency to 250kHz and get this result:
My interpretation is that "there are" some signals, although I dont understand why the "clock" signal seems to appear only every 20us. Now I am thinking, maybe this is some aliasing from undersampling.
Anyways, afterwards, I have connected the board and the D1 and measured Clock, Latch and Data at the D1 mini pins:
I have done that again using 2MHz sampling, and here it seems the clock signals arrive roughly every 10us:
I have too little experience to understand what we would expect here. No button was pressed at the pool, this is just listening.
The latch is always on 0V. I am somewhat surprised that the clock is not simply a "clock signal" but stays high for longer periods of time. Does this make sense ?
Anybody has some thoughts on this ?